I have 10 hens and 2 roosters in a 5 x 10 chicken coop. All 10 hens lay eggs only in 1 nest box. Every morning I let the girls out and they all go out to scratch around except 1 hen that goes to this nest box. Throughout the morning. The hens all take turns using this same box. They kind of hang around the coop door until it is their turn. After they have laid their egg, they are off to scratch and free range. By early afternoon there are 6 to 9 eggs all in the same box. There are 6 black copper marans, 3 speckled Sussex and 1 olive egger. The 2 roos are black copper marans. I have raised chickens for 45 years and never witnessed this type of behavior. Anyone else experienced this or have any ideas.